Diamond Cut
Diamond Cut does not refer to the shape of the diamond. Rather, cut refers to the manner in which the diamond cutter has transformed the dull rough diamond into a bright, sparkling polished diamond.
When you buy a diamond you should always ensure you buy a well cut diamond as the better the cut, the brighter the diamond. Dimonds which have been poorly cut are usually dull and dead and lifeless in appearance.
No matter the diamond shape you prefer, there are angles and proportions to which the diamond cutter must conform during the cutting and polishing process in order to ensure the diamond is well cut. A well cut diamond will be bright and beautiful and it will scintillate and shine as it should.
When a diamond is cut too deep or too shallow, light will escape from the diamond in such a way as to make the diamond appear dull and lifeless. However when the diamond is properly cut light reflects back out of the diamond through the top of the diamond making the diamond sparkle and appear bright and scintillating.
The best cut (round) diamonds money can buy are diamonds which exhibit Hearts and Arrows. Hearts and Arrows is a phenomenon exhibited only when a diamond has been perfectly cut. When you look at such a diamond through a Hearts and Arrows viewer the diamond exhibits eight perfectly symmetrical Hearts (when viewed from the top) and eight perfectly symmetrical Arrows (when viewed from the bottom). This is the image you see through the viewer, when a diamond exhibits Hearts and Arrows:

We have a huge selection of Hearts and Arrows diamonds which can be found be selecting ‘Hearts and Arrows’ under quality of cut in our Interactive Diamond Search.
Insist on a well cut diamond, because brightness and sparkle and scintillation of the diamond are the first thing people notice when they look at a diamond. In fact diamond cut is the only one of the diamond 4 C’s which over which man has any control.